MHT CET · Physics · Gravitation

The ratio of the binding energy of a satellite at rest on earth's surface to the binding energy of a satellite of same mass revolving around the earth at a height $h$ above the earth's surface is $(R$ = radius of the earth $)$ .

A $\frac{2 (R + h)}{R}$
B $\frac{R + h}{2 R}$
C $\frac{R + h}{R}$
D $\frac{R}{R + h}$

Verified Solution

Answer & Solution

Correct Answer

(C) $\frac{R + h}{R}$

Step-by-step Solution

Detailed explanation

Binding energy on the surface of the earth

E_{1} = \frac{G M m}{2 R}

Binding energy of revolving satellite

E_{2} = \frac{G M m}{2 (R + h)}

∴ \frac{E_{1}}{E_{2}} = \frac{(R + h)}{R}

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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The ratio of the binding energy of a satellite at rest on earth's surface to the binding energy of a satellite of same mass revolving around the earth at a height h above the earth's surface is (R= radius of the earth).

Step-by-step Solution

The ratio of the binding energy of a satellite at rest on earth's surface to the binding energy of a satellite of same mass revolving around the earth at a height $h$ above the earth's surface is $(R$ = radius of the earth $)$ .